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Electrical Wiring FAQ (Part 2 of 2)
Section - I'm buying a house! What should I do?

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Top Document: Electrical Wiring FAQ (Part 2 of 2)
Previous Document: Aluminum wiring
Next Document: What is this weird stuff? Old style wiring
See reader questions & answers on this topic! - Help others by sharing your knowledge

	Congratulations.  But...  It's generally a good idea to hire
	an inspector to look through the house for hidden gotchas.
	Not just for wiring, but plumbing and structural as well.  If an
	inspection of the wiring shows no problems or only one or two minor
	ones, we believe that you can consider the wiring safe (after any
	minor problems are fixed).  If there are signs of problems in many
	places, we suggest you look elsewhere.

	Here's some hints on what to look for:

	Obvious non-code wiring can include:

		- Zip cord wiring, either concealed or nailed to walls
		- Hot wiring on the identified (neutral) conductor without
		  proper marking.
		- Ungrounded grounding outlets (except when downstream of
		  a GFCI)
		- Splices hanging in mid-air (other than proper knob-and-tube)
		- Switched neutrals
		- Unsecured Romex swinging about like grapevines

	Certain wiring practices that are actually to code (or were at one
	time) sometimes reveal DIY wiring that may have hidden violations:

		- Switches that seem to control nothing (abandoned, perhaps
		  not properly terminated wiring)
		- A wall switch that controls things that you think it
		  shouldn't, for instance mysteriously removing power
		  from lights or outlets in other rooms. 
		- Switches and outlets in bizarre locations
		- Great numbers of junction boxes without outlets or lamps
		- Junction boxes with great numbers of wires going into them
		- Wiring that passes through a closet instead of a wall or
		  ceiling
		- Backwrapped grounding wires (ground wire wrapped around
		  the incoming cable insulation outside the box).
		- A breaker or fuse for outside wiring that is near the bottom
		  of the breaker panel or in an add-on fusebox.  The outdoor
		  wiring may have been homeowner-installed after the house was
		  built, and was not buried deep enough or was done with the
		  wrong kind of wire - if the wire is visible, check for "UF"
		  or "NMW" markings.

User Contributions:

Dev
Report this comment as inappropriate
Dec 21, 2011 @ 12:00 am
In a fire protection circuit, circuts are shown witha no example 6,8,4etc. what it mean?these circuits are connected between smode detector,junction box etc
kevin
Report this comment as inappropriate
Dec 24, 2011 @ 12:12 pm
My daughter dropped a small necklace behind her dresser. The necklace crossed a plug terminal and shorted the receptacle.
I bought a new receptacle and installed the same. I still have no power I suspect there could be a bigger problem,this is aluminum wiring.
I've killed the breaker and call an electrician but am curious as to what happened.P.s. there is a dimmer switch on the same circuit.
dennis
Report this comment as inappropriate
Feb 24, 2012 @ 11:11 am
Regarding new construction wiring and running 12/2 and 14/3 wire in the same box.

I have multiple switches to lights. Ran 12/2 and 14/3 into switch box and inspector wrote correction needed.

What should I have done instead?

thank you
dennis
Robert
Report this comment as inappropriate
Nov 26, 2012 @ 9:21 pm
Does a grounding electrode facilitate the operation of a OCPD, to clear a ground fault ?
@dennis
Report this comment as inappropriate
Mar 18, 2013 @ 10:10 am
Assuming you are installing two switches in a two switch box, you probably should have used 14/2 and 14/3 instead of replacing 14/2 with 12/2. If you are only installing one switch in a one switch box, you should only have one cable in the box.
P k
Report this comment as inappropriate
Jan 26, 2014 @ 10:10 am
I prefer to use nothing smaller than12 awg /the smallest sized wire on a circuit determines the allowable ampacity
Ex: 15 amp-14awg. 12awg-20amp only rule for thumb other factors such as continuous load,heating and others if you do not know the safe NEC rules then please call a qualified journeyman Electrician better be safe

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Top Document: Electrical Wiring FAQ (Part 2 of 2)
Previous Document: Aluminum wiring
Next Document: What is this weird stuff? Old style wiring

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Last Update March 27 2014 @ 02:11 PM